Bunk for logging cars



26, 1929. H. BRUCE BUNK FOR LOGGING CARS INVENTQR'.

ATTORNEY Feb. 26, 1929.

H. D. BRUCE BUNK ion LOGGING cans Filed Jan. 13, 1927 z smns sp ex "2 INVENTORI Hugh 0. Bruce ATTORNEY Patented Feb. 26, 19.2.9.

"UNITED STATES 1,703,569 PATENT OFFICE.

HUGH D. BRUCE, or BENTON, WASHINGTON, AssrGNoa .o FIFTY PER CENT TO FRANK s. ULLOM, F BENTON, WASHINGTON.

BUNK FOR LOGGING CARS.

Application filed January 13, 1927. Serial No. 160,815.

This invention relates to log bunks and chocks for use on railway cars and trucks.

The objectof my invention is the provision of improved devices of thischaracter which will be of strong and durable construction, efficient in operation, and convenient to adjust and controlb .More specific objects and advantages of the invention will appear in the following specification. V

The invention; consists in the novel constructio-n, adaptation. and combination of parts hereinafter described and claimed.-

In theaccompanying drawings,'-

5 Figurel is a view in longitudinal vertical section of devices embodying my invention, parts being broken away and parts omitted; Fig. 2 is an end elevation taken fromthe left hand side of Fig. 1; Fig. 3 is a fragmentary side elevation of the bunk shown in the preceding views; and Fig. 4 is a' perspective view of a! chock member shown detachedj Fig. 5 is a view similar toFig. 1 showing a modified construction of the beam contr0l ling mechanism;- and Fig. 6 is an end elevation, partly in vertical transverse section, ofFig.5.f

In said drawings, the reference numeral 10 represents the bunk gene'rally, the same being, preferably, of the shape'of a capital letter H in transverse section to afford a horizontal floor element 11 between two spaced apart wall elements .12. Said floor element 11 is provided with longitudinally disposed slots :5 13, one near each: end of the bunk. Extendshape in transverse, section, the upper or bar portion 16 of a'inember 15being of greater the rib extends, r

The upper surface of the bar portion 16 is serrated to affordlengthwise of the same a series of triangular shaped'teeth 17. In its opposite sides said bar is provided with grooves, such as19, which serve as guide ways for the chock studs to be hereinafter described. The guideways 19 extend from end stops, as 20, provided in-proximity to the outer end 21 ofv therespective bar portion. The inner end of a beam is pivotally connected by means'of. a pin 22 to thebunk.

The beam is adapted to be swung about its pivotal connection 22 so as to be elevated. to

e ase the teeth of thebeam, above the 'plane ing .into each of'said slots is the rib element 14 of a beam memberlfi of a substantially T-f width than that of the; slot 13 throughwhieh of the top edges 12 of the wall elements; or

lowered to have the teeth entirely below such hub, and a reach rod 27 extending from the arm 26 to an arm 28 of an operating shaft 29 which is journaled infa bearing provided in a side wall of the bunk near the end of the latter opposite to that near which the beam is located. p I

As shown in Figs. 2 and 8, a shaft 29 has rigidly securedthereto a peripherally toothed wheel 30 which is located between bifurcations of an. operating lever '[handle 31 which is fulcrumed upon the shaft. Said handle carries a pawl 32 which is engageable. with the wheel teeth when the handle.

is employed for rotating the shaft 29 and the arm26 toeffectthe turning of the cam 23 in its beam raising movement.

After serving to elevate the beam the cam is regulated to serve as a support for the beam, the bearing of the latter upon the cam should be in a vertical plane with'the axis of rotation of the cam.

33 represents a dog for. releasably engaging the wheel 30 when the cam is in its beamsupporting position.

Provided :for eachbeainis a chock 34 (Fig. 4) having a central body portion35 and front and rear portions which are disposed in angular relation therewith substantially as shown in l igs. 1 aud t.

The chocks rear portion, hereinafter termed the heel, is slotted to enable the check tostraddle the bar element 16 of a beam, the bifurcations 36 0f a chock at 0pposite sides of said bar'element being provided with studs v3'7, one on each bifurcation 36, to extend intothe respective grooves '19; whereby the chock is 'slidably and hingedly connected to the associated beam 15. A chocks front portion'38, hereinafter designated as the toe, hascentrally of its width, a tapered extremity to afford a reliable engagement with the teeth of the beam member. a

At its opposite sides, the toe is provided with protuberances or horn. elements 39 which are adapted to seat upon the top edges 12 of a bunk. Excepting the horns, the width of a chock is less then the distance between the side walls 12 of the bunk.

The modified construction, shown in Figs. and 6, differs from that illustrated in Figs. 1 and 2, with regard to the beam elevating means which in lieu of the cam, comprises toggle links ill-11. conneczed with each other by means of a pin 12, and connected with the beam 15 and bunk 10 by pins 4-5 and 44, respectively. In this instance. the pivotal pin 42 which couples a pair of links serves to connect the reach rod 27 with op erating means which may be similar to those illustrated and described with reference to Figs. 1 and 2, the corresponding parts be ing denoted by similar reference characters.

The toggle links and the operating arm 28 therefor pertaining to a beam are so arranged and proportioned that when the arm 28 is in alignment with the reach rod 27 the toggle links 40 and 41 will be brought into positions to have the axes of their pivotal connections ll 4-2, and 44 a vertical plane, or in dead centers, so speak, with the direction of t r. force gravitation tending to collapse the toggle link assembly.

In operation, the beams at both ends of a bunk are raised into positions such as occupied by the beam at the left hand side of Figs. 1 and 5 to cause the teeth 17 of the beams to be above the plane of the upper wall-edges 12 of the bunk. A tier of logs is then loaded upon the bunk, the central logs resting directly upon the bunk and the outer logs on the beams. The checks are then pushed inwardly of the bunk into on gaged relations with the logs so as to have i the chock toes 38 engage the teeth 17 of the beams whereby the logs are reliably retained by the chocks upon the bunk.

With the lower tier of logs thus secured, other logs may be piled thereon to complete the load.

lVhen the logs are to be released for dumping, the chock at that end of the bunk over which the logs are to be delivered is released by regulating the respective beam supportthe cam 23, as in Fig. 1, or the toggle links 40 and 6 .1, as in Fig. 5 to permit 'the beam to descend for withdrawing the teeth of the beam out ofcngageable relation with the chock.

When this occurs the horns 39 of a chock are brought into contact with the bunk wall edges 12 whereupon the lateral pressure exerted by the logs against the chockwill cause the latter to be shifted outwardly as from its dotted line position 3 1 for instance in Fig. 1 until the toe end of the chock falls over the end of the bunk as represented by the chock shown in full lines at the right handside of Figs. 1 and 5.

The outward movement of a check is limited by the studs 37 thereof encountering the stops 20 provided by the groove ends, one at each side of the bunk.

When in its outward movement the horns of a chock travel beyond the bunk walls, the outer or too end'of the chock falls so as to have he chock entirely below the plane of the top edges of the bunk walls, thereby rendering the chock incapable of obstructing the rolling or lateral sliding of the logs from the bunk.

While I have illustrated the invention in embodiments now preferred by me, I do not wish to be understood as'confining myself theretoexcept as limited by the appended claims.

What I claim, is,-

l. The combination with a bunk, and a check arranged for movement vertically and 'cludes a toothed beam pivotally connected at one of its ends to the bunk, and adjustable devices engaging the other end of the beam for elevating the same.

3. The combination with a bunk and a chock therefor, of vertically movable means adapted when in its elevated position to entirely support the chock and when in a lower position to cooperate with the bunk for supporting the chock, said means also being adapted when in its elevated position to hold the chock in log retaining position, and means for elevatingand lowering said vertically movable means.

t. In a bunk, a beam' provided with a series of teeth in its upper surface, said beam being connected to the bunk for vertical movement, a chock coupled at oneend 1 thereof with said beam for relative longitudinal movement and means for elevating the beam to locate the teeth thereof in engageable relation with the other end of said chock for releasably holding the chock 1 in selective log retaining positions.

5. The combination with a bunk having spaced apart side walls, a chock having one end thereof adapted to seat upon said side walls, a means adapted to be elevated into upper surface and pivotally connected at; one end thereof tothe bunk, means engag-j ing the beam in proximity of its other end for elevating and lowering the same, and

a chock slidably connected at one of itsv ends to the beam, the other end of the chock being formed to adapt the same to be supported upon the bunk and the beam when the beam is in its lower and upper positions respectively.

7. In a bunk, a chock arranged for hori zontal movement longitudinally of the bunk and also for movement vertically thereof, said chock being provided with laterally directed horn elements engageable with the bunk and vertically movable means engageable with the chock for releasably retainin the latter at a selected position longitudinally of the bunk.

8. In combination, a bunk provided. with side walls, a vertically movable beam disposed between said side walls, said beam I being provided with a series of teeth in its upper surface, and a groove in each side ofthe beam, a chock having one end thereof bifurcated to straddle said beam and provided with means engaging the beam in the groove thereof, the other end of said chock being adapted to engage upon the top edges of the bunk walls and also with the beam teeth selectively when the beam is in its elevated position, and means for elevating the beam in its chock engaging position.

Signed at Seattle, Washington, this 4th day of December, 1926.

v I HUGH D. BRUCE. 

